Issue when I am trying to check my trial

Hi everyone.

I am trying to check this trial related with validation rules

https://trailhead.salesforce.com/es-MX/content/learn/projects/customize-a-salesforce-object/create-validation-rules-1?trailmix_creator_id=strailhead&trailmix_slug=trailblazer-program-administrator-certification-prep

but the system is showing me this error:

 An unexpected error occurred while inserting Opportunity records and we couldn't check your work. Make sure Opportunity records can be inserted in this org, and click "Check Challenge" again. If this continues, contact the Trailhead Help team.

but I could create records in opportunity

https://curious-narwhal-ra13wm-dev-ed.trailblaze.lightning.force.com/lightning/r/Opportunity/006Qy000003ItHnIAK/view

I need to check this trial to finish the section and receive the points.

Thanks in advance.